I'm also in Ruby and passing the normal tests and then getting errors on the "random strings." The test says its expecting an empty string which doesn't make sense...... ("")

Same issue here lol. Should work for random string too - Expected: "", instead got: "jn11h2su3114vp5"

That's funny, I'm having a problem with the random tests in Ruby too, but whereas yours expected just a small part of the string, mine expected an empty string:

Should work for random string too - Expected: "", instead got: "1p1am2ge3we43v5gf6u37st8fi97w10fv11w412r6135j14an15is16ak17ki180s19"```